Removing GL context rate limiting feature and related wrappers

cc/trees/layer_tree_host.h

Index: cc/trees/layer_tree_host.h
diff --git a/cc/trees/layer_tree_host.h b/cc/trees/layer_tree_host.h
index 767cec8f1824d1670f204ed07bcfae1d9b473186..bd2dd368b258fa33eaf530152a5299a3b16ccd66 100644
--- a/cc/trees/layer_tree_host.h
+++ b/cc/trees/layer_tree_host.h
@@ -244,12 +244,6 @@ class CC_EXPORT LayerTreeHost : public MutatorHostClient {
   void ApplyScrollAndScale(ScrollAndScaleSet* info);
   void SetImplTransform(const gfx::Transform& transform);
 
-  // Virtual for tests.
-  virtual void StartRateLimiter();
-  virtual void StopRateLimiter();
-
-  void RateLimit();
-
   void SetDeviceScaleFactor(float device_scale_factor);
   float device_scale_factor() const { return device_scale_factor_; }
 
@@ -424,7 +418,6 @@ class CC_EXPORT LayerTreeHost : public MutatorHostClient {
 
   void SetPropertyTreesNeedRebuild();
 
-  bool inside_begin_main_frame_;
   bool needs_full_tree_sync_;
   bool needs_meta_info_recomputation_;
 
@@ -455,8 +448,6 @@ class CC_EXPORT LayerTreeHost : public MutatorHostClient {
 
   bool visible_;
 
-  base::OneShotTimer<LayerTreeHost> rate_limit_timer_;
-
   float page_scale_factor_;
   float min_page_scale_factor_;
   float max_page_scale_factor_;